<!DOCTYPE html>
<html lang="en">
<head>
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  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
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<style>
  .wrap span{
    color: red;
  }
  .wrap span{
    color: green;
  }
</style>
<body>

  <div class="wrap">
    <p>
      <span>
        你好
      </span>
    </p>
  </div>
</body>
</html>
